Phonograph-record.



No. 664,223. Patented Dec. I8, |900.

T. Hl LAMBERT. PHUNDGRAPH RECORD.

(Application led Mar. 3, 1900.) (N o M 0 d e I.)

'glli UNITED STATES PATENT OFFICE.

THOMAS B. LAMBERT, OF CHICAGO, ILLINOIS.

PHONOGRAPH-RECORD.

SPECIFICATION forming part of Letters Patent No. 664,223, dated December 18, 1900.

Application filed March 3. 1900. Serial No. 7,191. (No model.)

To t/Z whom it may concern,.-

Be it known that I, THOMAS B. LAMBERT, a citizen of the United States, residing at Ohicago, Illinois, have made certain new and useful Improvements in Phonograph-Cylinders, of which the following is a specification.

The object of my invention is to cheapen the cost of phonographic cylinders by employing in their construction a cheaper grade of material for the main body of the cylinder than has heretofore been used and providing the surface of the cylinders only with asuflicient quantity of the expensive or fine material to form a surface or coating of the requisite homogeneous character'on which the impressions are made; and my invention consists in the features and details of construction hereinafter described and claimed.

In the drawings, Figure l represents an end view of one of my improved phonographic cylinders. Fig. 2 represents a longitudinal section taken on the line 2 of Fig. I, and Fig. 3 represents a longitudinal section of a cylinder somewhat modified in construction.

In. making my improved cylinder for phonographs I make the interior body of the cylinder of a composition A of celluloid or other suitable material, which may be formed of coarse and cheap ingredients and such as would not be of the quality of requisite fineness, delicacy, or homogeneity to receive the impressions adequate for use. This coarseness or cheapness of the ingredients used is represented in the body or interior of the cylinder by the dots in the drawings. The interior surface or form of the cylinder is intended to be made in the usual way to adapt. it to be placed on the mandrels usually employed in phonographs or similar machines and need not be described in detail or at length. To give the cylinder the ne and homogeneous surface or exterior adapted to receive the record impressions, I provide it with a coating, cover, or veneer B, made of material of the requisite fineness. This coating or veneer may be composed of the same material as that forming the body of the cylinder, except that it must be of the requisite fineness and delicacy for the purpose intended,although,if preferred,it may be formed It may be of dierent suitable material.

made either integral with the body of the cylinder or as a separate envelop and afterward applied. In either case, however, due regard should be had to their relative coefficients of contraction and expansion, so that as expansion or contraction takes place due to changes of temperature little or no strain will occur between the two, so as to insure the permanence of their form and relation.

If preferred, a solution of the requisite fine material can be applied to the exterior surface of the cylinder, so as to form the cover, coating, or veneer desired. The solution in such case may consist of the same material composing the body of the cylinder, except that it should be of a finer or superior grade, so as to be of a more homogeneous quality to present an exterior surface of the requisite fineness to receive the record impressions. When celluloid is used both for the body of the cylinder andas the base of the solution, the solvent that I prefer to employ for the solution is methyl acetate orethyl acetate. In treating the exterior surface of the cylinder to the solution I prefer to rotate the surface of the cylinder instead of submerging or dipping, asin such case no greater amount of the solution will be required than to cover or veneer the exterior surface.

In Fig. 3 Ihave shown still another moditication. In this case the body of the cylinder is formed, as already explained, of celluloid or similar material. To make the exterior surface of sufficient fineness and homogeueity to receive the record impressions and reproduce the records therefrom, I treat such surface, if the cylinder is4 made of celluloid, with a solvent such as methyl acetate or ethyl acetate. In such case the surface of the cylinder and the solvent coming in contact with it forms a solution over the surface in which the finer particles are brought to the surface and the impurities or coaser particles left at a greater depth in the cylinder, so that a surface is produced of the requisite fineness and quality desired; but however .made the cylinder is formed of an interior body portion of coarse or cheap material and an exterior surface of fine and suitable similar material adapted for the purpose for which it is to be used.

IOO

While I have described my invention as itis employed in the manufacture of phonograph-cylinders, yetit is obvious that it may be used in the manufacture of other impression-records besides those of phonograph-cylinders and that it is not necessary in order to secure the benefits of the invention that the impression-surface be made in cylindrical form, as it is apparent that the invention is applicable to all cases where it is desired to make a body portion of coarse particles of Celluloid or other suitable material and the surface intended to receive delicate impressions of a finer quality of the same material Whether the impression-record be intended for use in a phonograph or other similar mechanism or Whether the impression-surface of such record be curved or Hat.

XVhat I regard as new, and desire to secure by Letters Patent, is-

l. Asa new article of manufacture, an impression record having its body portion formed of coarse material and its impressionsurface formed of similar material of a finer and more homogeneous quality, substantially as described.

2. As a new article of manufacture, an impression record having its body portion formed of coarse material and its impressionsurface formed of similar material of a finer and more homogeneous quality integral therewith, substantially as described.

THOMAS B. LAMBERT.

Witnesses:

EPHRAIM BANNING, THOMAS B. MCGREGOR. 

